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Full-waveform laser radar data waveform decomposing method

A laser radar and waveform decomposition technology, applied in radio wave measurement systems, instruments, etc., can solve the problems that components cannot be completely detected, affect the accuracy of waveform decomposition, etc., and achieve the effect of simple algorithm, guaranteed integrity and high detection efficiency

Inactive Publication Date: 2015-01-14
ACAD OF OPTO ELECTRONICS CHINESE ACAD OF SCI
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Problems solved by technology

[0006] Although the method in Reference 2 can detect the missing components in the echo to a certain extent, since the model is initialized with the minimum fitting residual error as the optimal condition, the error introduced will bring serious problems to the subsequent waveforms before the waveform decomposition. The impact of missing component detection, resulting in components that may not be completely detected, affecting the accuracy of waveform decomposition

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[0023] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be noted that, in the drawings or descriptions of the specification, similar or identical parts all use the same figure numbers. Implementations not shown or described in the accompanying drawings are forms known to those of ordinary skill in the art. Additionally, while illustrations of parameters including particular values ​​may be provided herein, it should be understood that the parameters need not be exactly equal to the corresponding values, but rather may approximate the corresponding values ​​within acceptable error margins or design constraints.

[0024] Aiming at the problem of missing components in the waveform decomposition of full-waveform laser radar data, the present invention proposes a waveform d...

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Abstract

The invention provides a full-waveform laser radar data waveform decomposing method. Component number estimation is carried out through the Akaike Information Criterion (AIC), lost component detection is carried out through the Levenberg-Marquardt (LM), component number information in a back scattering echo waveform can be rapidly obtained, the algorithm is simple, and the detecting efficiency is high. Compared with an ordinary waveform decomposing method, the initialization accuracy of the model component number and the integrity of waveform decomposition are combined.

Description

technical field [0001] The invention relates to the technical field of remote sensing and earth observation, in particular to a method for decomposing waveforms of full-waveform lidar data. Background technique [0002] As a new type of remote sensing earth observation technology, airborne lidar can directly obtain three-dimensional information of ground targets. It is widely used in digital cities, emergency disaster reduction, environmental monitoring and other aspects, and is an effective supplement to traditional photogrammetry technology. Compared with the limited amount of ground object-related information obtained by the traditional laser radar system, the full waveform laser radar system records all the information of the laser echo at a very small sampling interval and stores it digitally, which is essentially the information of the ground objects in the direction of laser beam propagation. The superposition of each echo information can provide rich vertical structu...

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Application Information

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IPC IPC(8): G01S7/487
CPCG01S7/4866G01S7/487
Inventor 李传荣周梅唐伶俐胡坚刘梦华王金虎张正
Owner ACAD OF OPTO ELECTRONICS CHINESE ACAD OF SCI
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